An aggressive castling never occurred to me.

I actually had created another chess problem where castling playes a role before, but this new one is somewhat more difficult.

From a scientific point of view I can imagine that also this problem could be interesting for you.
Unfortunately the diagram is not shown in the article anymore. Therefore I added it again in one comment (it would be great to be able to edit also old articles).

Your idea to use a 'real' chess board again for analyzing chess positions sounds reasonable. :)